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Página 1 desde 31 resultados
Effects of cannabinoid receptor agonists on immunologically induced histamine release from rat peritoneal mast cells.
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Immunologic activation of mast cells through the cross-linking of high affinity IgE receptors results in the release of inflammatory mediators which are important in the pathogenesis of allergic reactions. Early studies investigating the effects of palmitoylethanolamide on animal models of
Airway response to inhaled histamine in asymptomatic long-term marijuana smokers.
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Bronchial challenge with histamine was used to assess bronchial reactivity in asymptomatic individuals who were long-term social smokers of marijuana. Their reactivity was compared to that of nonsmokers and asthmatics. Spirometry results were normal in the marijuana users. There was no significant
Differential effect of cannabinoid agonists and endocannabinoids on histamine release from distinct regions of the rat brain.
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Cannabinoids exert complex actions on neurotransmitter systems involved in cognition, locomotion, appetite, but no information was available so far on the interactions between the endocannabinoid system and histaminergic neurons that command several, similar behavioural states and memory. In this
Histamine induced responses are attenuated by a cannabinoid receptor agonist in human skin.
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OBJECTIVE
In the present study we examined the effects of the cannabinoid receptor agonist HU210 on histamine-evoked somatosensory and vascular responses in humans.
METHODS
Two sets of experiments were performed, in which twelve (Study 1, iontophoresis) and six participants (Study 2, microdialysis)
Regulation of nerve growth factor induced histamine and arachidonic acid release from rat mast cells by cannabinoids.
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Effects of cannabinoids on non-adrenergic non-cholinergic-mediated relaxation in guinea-pig trachea.
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The effects of cannabinoid receptor agonists on the non-adrenergic non-cholinergic (NANC) inhibitory responses to electrical field stimulation in guinea-pig trachea were assessed. R-(+)-[2,3-dihydro-5-methyl-3-[(morpholilinyl) methyl]pyrrolo [1,2,3-de]-1,4-benzoxazin-6-yl]-(1-naphthalenyl)methanone
Inhibition of serotonin release in the mouse brain via presynaptic cannabinoid CB1 receptors.
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We studied whether serotonin release in the CNS is inhibited via cannabinoid receptors. In mouse brain cortex slices preincubated with [3H]serotonin and superfused with medium containing indalpine and metitepine, tritium overflow was evoked either electrically (3 Hz) or by introduction of Ca2+ (1.3
Modulation of gastric acid secretion by cannabinoids in rats.
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The current study aimed to evaluate the role of cannabinoid receptors in the regulation of gastric acid secretion and oxidative stress in gastric mucosa. To fulfill this aim, gastric acid secretion stimulated with histamine (5 mg/kg, subcutaneous [SC]), 2-deoxy- d-glucose (D-G) (200 mg/kg,
Cannabinoid CB1 receptor-mediated inhibition of noradrenaline release in guinea-pig vessels, but not in rat and mouse aorta.
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Cannabinoids exert complex effects on blood pressure related to their interference with cardiovascular centres in the central nervous system and to their direct influence on vascular muscle, vascular endothelium and heart. In view of the relative lack of information on the occurrence of CB1
Falcarinol is a covalent cannabinoid CB1 receptor antagonist and induces pro-allergic effects in skin.
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The skin irritant polyyne falcarinol (panaxynol, carotatoxin) is found in carrots, parsley, celery, and in the medicinal plant Panax ginseng. In our ongoing search for new cannabinoid (CB) receptor ligands we have isolated falcarinol from the endemic Sardinian plant Seseli praecox. We show that
Bronchial asthma due to Cannabis sativa seed.
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A 51-year-old man with asthmatic attacks due to Cannabis sativa seed inhalation was studied. Specific IgE against this seed was demonstrated by in vivo (skin and bronchial challenge tests) and in vitro methods (reverse enzyme immunoassay and histamine release from basophils), suggesting a Type I
DDD-028: a potent potential non-opioid, non-cannabinoid analgesic for neuropathic and inflammatory pain.
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DDD-028 (4), a novel pentacyclic pyridoindolobenzazepine derivative was evaluated in vitro for receptor binding affinity and in vivo for analgesic activity using rodent models of neuropathic and inflammatory pain. DDD-028 does not bind to opioid, cannabinoid, dopamine, or histamine receptors.
Selective Cannabinoid Receptor-1 Agonists Regulate Mast Cell Activation in an Oxazolone-Induced Atopic Dermatitis Model.
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BACKGROUND
Many inflammatory mediators, including various cytokines (e.g. interleukins and tumor necrosis factor [TNF]), inflammatory proteases, and histamine are released following mast cell activation. However, the endogenous modulators for mast cell activation and the underlying mechanism have
Receptor-independent effects of natural cannabinoids in rat peritoneal mast cells in vitro.
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Cannabinoids can activate CB(1) and CB(2) receptors. Since a CB(2) mRNA has been described in rat peritoneal mast cells (RPMC), we investigated a series of cannabinoids and derivatives for their capacity to stimulate RPMC. Effects of natural cannabinoids Delta(9)-tetrahydrocannabinol (Delta(9)-THC),
IgE-mediated hypersensitivity reactions to cannabis in laboratory personnel.
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BACKGROUND
There have been sporadic reports of hypersensitivity reactions to plants of the Cannabinaceae family (hemp and hops), but it has remained unclear whether these reactions are immunologic or nonimmunologic in nature.
OBJECTIVE
We examined the IgE-binding and histamine-releasing properties
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